William McLellin attested that there is "a cloud of faithful witnesses" of the plates.
William E. McLellin as found in Mitchell K. Schaefer, ed., The Lost Manuscript, 167, reproduced in Mitchell K. Schaefer, "'The Testimony of Men': William E. McLellin and the Book of Mormon Witnesses," BYU Studies 50, no. 1 (2011): 107
14. I [W. E. McLellin] in company with <a> friend, <I> visited one of the eight witnesses [John Whitmer] <in 1869>—the only one who is now alive, and he bore a very lucid and rational testimony, and gave us many interesting particulars. He was a young man when he had those testimonies. He is now <was then> sixty eight years old, and still he is firm in his faith. Now I would ask what will I do with such a cloud of faithful witnesses, bearing such a rational and yet solemn testimony? These men while in the prime of life, saw the vision of the angel, and bore their testimony to all people. And eight men saw the plates, and handled them. Hence these men all knew the things they declared to be positively true. And that too while they were young, and now when old they declare the same things.